WO2006132184A1

WO2006132184A1 - Sandwich panel including honeycomb structure body and method of producing the sandwich panel

Info

Publication number: WO2006132184A1
Application number: PCT/JP2006/311230
Authority: WO
Inventors: Kouichi Take; Kunio Takahashi
Original assignee: Kabushiki Kaisha Shizuka
Priority date: 2005-06-08
Filing date: 2006-06-05
Publication date: 2006-12-14
Also published as: EP1829674B1; KR20080012827A; CN101142078B; US20110079338A1; CN101142078A; EP1829674A1; KR100932381B1; EP1829674A4

Abstract

The height and width of a sheet-liker filler material before it is placed in a cell of a honeycomb material is set greater than those of the honeycomb material, and after the placement, peripheral edges of the honeycomb material are fringed with filler materials to prevent a filler material from falling out of an end section cell. A liquid adhesive agent is applied to the top of cell walls facing one surface of the honeycomb material, and a surface material is pressed to that surface of the honeycomb material to which the adhesive agent is applied. Then, before the adhesive agent hardens, water-absorbing foam materials are placed in cell spaces by pressing them into the cell spaces from the other surface of the honeycomb material until they are in contact with the adhesive agent. The foam materials in contact with the adhesive agent absorb moisture contained in the agent to promote the hardening, and as a result, the surface material is quickly adhered to the honeycomb material.

Description

Specification

Sandwich panel including honeycomb structure and manufacturing method thereof

Technical field

[0001] The present invention uses a herm cam structure in which a phenol foam material having an open cell structure is filled in a cell of a her cam material as a core material, and uses a porous material having air permeability as a surface material. The present invention relates to a temper sandwich panel and a method for manufacturing the same.

Background art

[0002] Structures using a honeycomb material as a core material are often used on the walls and floor surfaces of aircraft, railway vehicles, and building materials. As the purpose of using the Hercam structure, it is important to use it as a sound absorbing material as well as a sound insulating material.

[0003] In this specification, the sound insulating material is a structure that blocks sound propagation by attaching non-breathable face materials on both sides while filling or not filling cells of the honeycomb material, and the sound absorbing material is The honeycomb material cell is filled with a porous material, and a surface material having air permeability is attached to at least one surface of the honeycomb material, and sound is incident through the air-permeable surface material to make the porous material porous. Think of it as a structure that absorbs and attenuates sound. However, whether a certain hard cam structure is regarded as a sound insulating material or a sound absorbing material differs depending on the controversy, and is not necessarily clear.

[0004] Prior art documents considered to be relevant to the present invention will be given and briefly described.

A conventional example of filling a honeycomb material cell with a filler can be found, for example, in Patent Document 1 below. FIG. 1A of the present application shows the structure of the structure described in Patent Document 1 in which the vertical and horizontal dimensions of the her cam material 2 and the filler 1 are the same, and FIG. 1B is as shown in FIG. 1A. The cell force filler at the end of the constructed two-cam material is shown dropping off.

[0005] The reason why the filler falls off is that a part of the hexagonal wall of the cell is cut off and opened at the end of the honeycomb material, and the filler cannot be stably held by the wall surface. Moreover, when making a sandwich panel using such a structure as a core material, it is necessary to cut the core material so that the dimensions of the core material match those of the surface material. However, the vertical and horizontal dimensions of the honeycomb material and the filler are the same. In this case, the cutting position is inevitably applied to the hard cam material, and the cell is cut at that position, and the filler is unavoidably dropped. [0006] If an unfilled space is created at the end of the honeycomb material due to the falling off of the filler, the design performance such as heat insulation and soundproofing expected for the filler is lost at that portion, and the commercial value is impaired. In addition, if the filler is removed during the preparation of the sandwich panel, the panel forming operation such as the dimensional adjustment of the core material is hindered, and the work efficiency is lowered. In addition, dropped fillers cannot be left and must be disposed of as waste! /.

[0007] As a measure to prevent the filler from falling off, a method of fixing the filler by applying an adhesive to the honeycomb material is conceivable. However, the use of the adhesive not only increases the man-hours but also increases the cost and weight. In addition, there is a risk that the adhesive layer may reduce the performance of heat insulation and sound absorption.

[0008] In Patent Document 2, the name of the invention is "a method for producing a sound absorbing panel". This sound-absorbing panel is obtained by attaching a face material in which a net-like and perforated metal plate is superimposed on both surfaces of a cell-unfilled honeycomb material with an ultra-thin film adhesive made of thermosetting resin. The point that the cell is not filled is not as defined in the sound absorbing material above. Regarding the method of using the adhesive, a film adhesive is bonded to the surface of the hard cam material with another adhesive, and then heated and melted with hot air to form a plurality of holes communicating with the hard cam core. A special film-like adhesive for V which does not impair the breathability of the face material and a method for using the same are disclosed.

In Patent Document 3, the name of the invention is “a method for producing a panel-like core material”. It has been disclosed that foam foam material is pressed into the hard cam material, and adhesive is provided on the inner surface of the cell by immersion spraying, etc., but the adhesive does not block the ventilation holes of the breathable cover material It seems that no particular use of is disclosed. In the attached drawing (Fig. 6 in the same document) explaining the embodiment, the adhesive is drawn flat (horizontal line) between the cover material and the honeycomb material.

[0010] The name of the device of Patent Document 4 is “sandwich panel”, and a synthetic resin foam having a thickness smaller than that of the honeycomb-shaped core is filled in a substantially central portion in the direction of the thickness of the heart-shaped core. Related to the sandwich panel. In the description, the hermetic core and the outer cover plate are bonded only on the end surface of the hermetic core, and the end surface of the press-fitted polyurethane foam is the end surface of the hermetic core. In the case of the same surface, there is a description that the foam may be melted by an adhesive that bonds the heart-shaped core and the cover plate, and that the cover plate is uneven. In addition, in order not to impair the air permeability of the jacket plate and the breathability of the jacket plate A special usage method of the adhesive is disclosed, and it is a pattern.

Patent Document 1: Japanese Patent Laid-Open No. 7-88995

Patent Document 2: Japanese Patent Laid-Open No. 9-156010

Patent Document 3: JP-A-1-198951

Patent Document 4: Japanese Utility Model Publication No. 61-30844

Disclosure of the invention

Problems to be solved by the invention

[0012] An object of the present invention is to provide a breathable sandwich panel that functions as a sound-absorbing material by using a two-cam material filled with a foam material having a breathing structure as a core material and a breathable porous material as a surface material. Propose measures to effectively prevent the filler from falling off from the cells at the edge of the hard cam material (first issue), and bonding that does not impair the breathability of the foam material or porous material It is to propose a method for manufacturing sandwich panels including the use of the agent!

Means for solving the problem

[0013] The first problem is that the cell space of the her cam material is filled with a phenol foam material having an open cell structure, and the vertical and horizontal dimensions of the sheet-like phenol foam material before filling are determined. This is solved by a hard cam structure (claim 1) characterized in that, after filling, the peripheral edge of the hard cam material is trimmed by the filled phenol foam material. Is done.

[0014] As the honeycomb material, a material made of paper, metal, resin, ceramics or other materials can be selected, and as the filler, a foam material made of a hard foam of synthetic resin such as phenol, urethane, styrene or the like is used. Can be used. In particular, a phenol foam material having an open cell structure is preferable because it exhibits excellent water absorption capability and sound energy absorption performance. If a honeycomb material and a filler are stacked and press-fitted with a press machine, a honeycomb structure in which the honeycomb material cell space is filled with the filler is completed.

[0015] In addition, the second problem is that a liquid adhesive having a predetermined viscosity is attached in a narrow strip shape only at the tip of the cell wall facing one side of the hard cam material, and a surface material having air permeability is obtained. And press against the one surface of the honeycomb material to which the adhesive is adhered, before the adhesive is cured. In addition, the foam material having water absorption is pushed into the cell space until it touches the other adhesive force of the adhesive-cam material, and the foam material in contact with the adhesive contains moisture contained in the adhesive. The method of manufacturing a breathable sandwich panel includes steps of absorbing hardening to accelerate curing and quickly achieving adhesion of the surface material to the hard cam material (claims)

Solved by 6).

[0016] It is necessary to avoid applying a solid adhesive to the air-permeable surface material of the foam material because the air-permeable surface is blocked and its function is impaired. An alternative solution to this problem is to limit the location and amount of adhesive used so that air permeability is not impaired. The attachment of the hard cam material and the surface material is performed at the tip of the cell wall of the honeycomb material and a localized portion in the surface material with which the tip contacts. It is therefore sufficient to supply only the minimum amount of adhesive that can bond these points. Specifically, the adhesive may be attached only to the tip of the cell wall in a narrow band shape having a width of 1 to 2 mm, and pressed against the surface material as it is to cure the adhesive.

[0017] In order to cure the adhesive, it is necessary to take away the moisture in the adhesive. However, the inside of the sound switch panel during production is a closed space although it has air permeability, so the evaporation rate of moisture is high. Slow adhesive curing takes time. Therefore, in the present invention, attention is paid to the water absorption of the phenol foam material, and this is used as a means for promoting the curing of the adhesive. That is, an adhesive is attached to the tip of the cell wall of the her cam material, and the tip of the phenol foam material that absorbs water from the other surface of the her cam material is bonded to the surface material. Push in until the adhesive is attached to bring a part of the foam material into contact with the adhesive. As a result, the moisture content of the adhesive is rapidly absorbed by the foam material, and the curing of the adhesive is promoted. The moisture absorbed by the foam material is then gradually released into the outside air due to the air permeability of the sandwich panel.

The invention's effect

[0018] According to the honeycomb structure of the first aspect of the present invention, since the planar dimension of the filler is larger than the planar dimension of the honeycomb material, the filler is filled even after filling the cell space of the nonicum material. The material is not cut apart at the periphery of the hard cam material and remains integrated, and the peripheral portion of the hard material is embedded, so that the filling material does not fall off. . [0019] When the above honeycomb structure is used as a core material for a sandwich panel, the filler is exposed around the core material, so that the appearance is easy to process and the end faces are easily aligned.

[0020] Further, as a post-processing, a buried plate is partially inserted around the sandwich panel and bonded to the surface material to form a reinforcing seat for mounting parts, etc., or a plywood or a resin plate is placed around the panel. Even when it is inserted and bonded to the surface material, the processing is easy due to the flexibility and ease of cutting of the filler exposed at the periphery of the core material.

[0021] Further, according to the method for manufacturing a sandwich panel according to the invention of claim 6, since the adhesive adhesion area in the surface material is severely restricted, the obstruction of air permeability can be minimized. For example, in the case of a hard cam material in which hexagonal cells are connected, the location where the adhesive is present is limited to the tip of the cell wall and the hexagonal outline in the surface material with which the tip abuts. Since the cell wall is made thin, the area where the adhesive is present is limited even if it is slightly expanded.

[0022] Further, according to this manufacturing method, the adhesive foam is rapidly cured by absorbing the moisture content of the adhesive into the phenol foam material, so that it is possible to accurately prevent the surface material from being displaced from the pressed position. Positioning is achieved. The adhesive is cured by filling the concave corners formed by the tips of the orthogonal cell walls and the surface material into a solid fillet shape.

BEST MODE FOR CARRYING OUT THE INVENTION

[0023] (First embodiment)

According to a first embodiment of the invention of claim 1, in the above-mentioned her cam structure, a projecting portion in which one or both ends in the vertical direction of the her cam material is projected by a predetermined length of the surface force of the filler is provided. (Claim 2).

[0024] In the case of manufacturing a sandwich panel by using a two-cam structure body provided with the above protrusion as a core material and bonding a surface material thereto, an adhesive is attached only to the tip of the protrusion, A sandwich panel manufacturing method that does not allow adhesive to adhere to the surface of the filler becomes possible.

[0025] (Second Embodiment)

According to a second embodiment of the invention of claim 1, in the above-mentioned hard cam structure, the two filler sheets are filled into the cell space of the two-cam material at a longitudinal interval, and the honeycomb Inside the material In the middle of the two filler layers, there is no filler! If there is an air layer! (Claim 3).

[0026] By providing the honeycomb structure with the air layer of the present embodiment, the sound absorbing performance from low frequency to high frequency is improved, and a sound absorbing material for the entire region can be realized.

[0027] (Third embodiment)

According to a third embodiment of the invention of claim 1, in the above-mentioned hard cam structure, the upper and lower side forces of the sheet-like phenol foam material having a thickness exceeding the total height of the two double cam materials A single hard cam material is press-fitted, and a layer in which the hard cam material does not exist and only the filler power is provided is provided in an intermediate portion in the thickness direction of the filler (claim 4).

[0028] By providing the honeycomb structure with an intermediate layer (a layer in which no two-cam material is present) that only has the filler of the present embodiment, heat conducted through the honeycomb material wall is blocked by the intermediate layer. The foam material constituting the interlayer becomes a heat insulating layer. Increasing the thickness of the intermediate layer improves the heat insulation performance. The hard cam material layer located on both sides serves as a protective layer for the foam material.

[0029] (Fourth embodiment)

The invention of claim 1 or the embodiment according to each of the above embodiments is to manufacture a sandwich panel by using any of the honeycomb structures as a core material and bonding a surface material thereto. At this time, the adhesive applied to the back surface of the surface material can be pressed and adhered to the surface of the core material or the protruding portion (first embodiment) protruding from the surface.

[0030] (Fifth embodiment)

The embodiment according to the invention of claim 6 is an emulsion adhesive having a predetermined viscosity as the adhesive, wherein the adhesive is attached in a narrow band shape only at the tip of the cell wall. This is achieved by selecting the agent and pouring the adhesive to a predetermined depth in a flat shallow container that is held horizontally, and then immersing only the tip of the cell wall of the hard cam material into it and pulling it up. (Claim 7).

[0031] When the adhesive is attached to the tip of the cell wall, the low-viscosity adhesive that flows smoothly flows and a sufficient amount of adhesion cannot be obtained, so that the adhesive has an appropriate viscosity (and surface tension). It is desirable to have In the present invention, the emulsion adhesive is selected because of such viewpoint power. As described in claim 6, the adhesive can be applied in a narrow band only at the tip of the cell wall. The simplest method is to immerse the honeycomb material to a predetermined depth in a flat shallow container (bat) filled with adhesive.

Example 1

FIGS. 2A and 2B are a sectional view and a perspective view showing a her cam structure comprising a foam material 1 and a her cam material 2 as a first embodiment of the present invention. In this example, the foam material 1 is a solid open-cell phenol foam material with a density of 30 kgZm ³ or less and a vertical 'horizontal' thickness of 1030 x 1030 x 28 mm in the form of a sheet material. As the material 2, a paper hammer material with a length, width and thickness of 1000 x 1000 x 30 mm and a cell size (dimension between parallel sides of the cell) of 12 mm was used. The phenol foam material used has a low density and is hard, can be easily cut with a hard cam material cell, and is hard, so it can be filled into a hard cam material cell! ,.

[0033] FIGS. 2A and 2B illustrate two features of the above-described Hercam structure. The first feature is that the vertical and horizontal dimensions of the foam material 1 are 30 mm larger than the dimensions of the hard cam material 2, so that the periphery of the hard cam material 2 is surrounded by an edge 3 having a width of 15 mm. This is a feature directly derived from the problem solving means of the present invention.

Another feature is a structure in which the protruding portion 4 of the hard cam material 2 is formed on the surface of the foam material 1. In order to form the protruding portion 4, for example, a 30 mm thick hard cam material 2 placed on the top surface of a foam material 1 having a thickness of 28 mm is pushed in by a press, and the bottom surface of the foam material 1 and the hard material are formed. If the indentation is stopped when the bottom surfaces of 2 coincide with each other, a structure in which the upper end of the hard material 2 protrudes 2 mm from the surface of the foam material 1 is obtained. The protruding portion 4 of the hard cam material 2 is useful for protecting the surface of the foam material 1 and is protruded when the sandwich structure is manufactured by attaching the her cam structure to the surface material as a core material. A manufacturing method is possible in which the adhesive is attached only to the tip of the part 4 and the adhesive is not attached to the surface of the foam material 1.

[0035] Depending on the purpose of use, the foam material and the hard cam material may have the same thickness, and the two-cam material may be finished flat without protruding.

Example 2

FIGS. 3A and 3B are a cross-sectional view and a perspective view of a nose-cam structure having an air layer 5 provided in the middle as a second embodiment of the present invention. This honeycomb structure having an air layer 5 in the middle is effective for sound absorption applications corresponding to the entire region from low frequency to high frequency. In this example, the height is The dimensions and materials are the same as in Example 1 except that the 50 mm Hercam material 2 and two foam materials 1 and 1 'having a thickness of 20 mm are used. The foam materials 1 and 1 ′ may be foam materials having a thickness of 15 mm and 25 mm, for example.

[0037] When these two foam materials are pressed from both sides or one side of the hard cam material with a press and filled at a vertical interval, the circumference of the hard cam material in each foam material is 15 mm wide. The foam material is trimmed, and an air layer 5 having a thickness of 10 mm is formed in the middle of the two foam materials in the vertical direction. 3 is a support member inserted between the upper and lower borders 3 in order to stably maintain the 10 mm air layer 5. The support material 3a may be produced by either pre-molding the foam material into a frame shape or inserting a prismatic foam material between the two foam materials.

Example 3

FIGS. 4A and 4B are a cross-sectional view and a perspective view of a her cam structure as a third embodiment of the present invention. In this hard cam structure, two hard cam materials 2, 2 'are interposed in the upper and lower parts of the thick foam material 1, and the hard cam material exists between the two hard cam materials. The intermediate layer 6 is a foam material layer that does not. The dimensions and materials are the same as in Example 1 above, except that the thickness of the foam material 1 is 50 mm, and two hard cam materials having a height of 20 mm are used. The her cam materials 2, 2 'may be two her cam materials having heights of 15 mm and 25 mm, for example. Also in this embodiment, the circumference of the her cam material is trimmed by the fringe portion 3, and the projections 4 and 4 'of the respective her cam materials are formed on both sides of the foam material.

[0039] In the her cam structure of this embodiment, heat conducted through the her cam material wall is blocked by the intermediate layer 6, and the foam material constituting the intermediate layer 6 becomes a heat insulating layer. Increasing the thickness of the intermediate layer 6 improves the heat insulation performance. The hard cam materials 2 and 2 located near both sides of the foam material are protective materials for the foam material 1.

Example 4

FIGS. 5A and 5B are a cross-sectional view and a perspective view, respectively, of a sandwich panel using the heart cam structure shown in FIG. 2 as a core material as a fourth embodiment of the present invention. As shown in FIG. 2, the her cam structure that constitutes this sandwich panel has her cam material protrusions 4 formed on both sides of the foam material together with the rim 3 and this protrusion 4 is an adhesive. 7 is the adhesive part that holds Both surface materials 8, 8 'are bonded. For the surface materials 8 and 8 'in this example, a non-breathable 1.2 mm aluminum material was used on both sides. To obtain sound absorption and humidity control functions, use a porous material with air permeability on one or both sides. The core material may be one in which the protruding portion 4 is formed only on one side of the foam material, or does not have the protruding portion 4 on both sides.

[0041] The sandwich panel of this example was manufactured by the following procedure. Apply two-component epoxy adhesive 7 with sufficient stirring and mixing to the surface of the two aluminum materials 8 and 8 'at a rate of 300 to 600 g, m ² Adhere the hard cam material end 4 together. After the adhesive is cured, the panel edge is cut to finish according to the dimensions of the aluminum surface material. The edge of the panel is covered with the edge 3 of the foam material, so force is easy.

Example 5

[0042] FIGS. 6A, B, B and C show the completed fourth embodiment of the sun as a fifth embodiment of the present invention.

1 2

Three examples of post-processing for Deutsch panels are shown. Fig. 6A shows an example in which the reinforcement seat 5a is partially inserted around the panel. Figs. 6B and 6B show the connecting plate 5b2 that connects the two panels.

1 2

FIG. 6C is an example in which a protective plate 5c is attached to the entire periphery of the panel.

[0043] In each of the above-described embodiments, the force in which the vertical and horizontal dimensions of the foam material are both larger than the vertical and horizontal dimensions of the hard cam material. Only one of the vertical and horizontal dimensions of the foam material is the vertical and horizontal dimensions of the hard cam material. Even when it is larger than the dimensions, it has practically the same effect as the above examples.

Example 6

FIG. 7 to FIG. 10 are conceptual diagrams or cross-sectional views illustrating the process of manufacturing a breathable sandwich panel according to this embodiment in the order of steps.

[0045] FIG. 7 (A) is a diagram showing a state in which the adhesive 7 is uniformly poured to a depth of 2 to 3 mm into a container 9 having a flat bottom and an open top, and a hard cam material 2 is placed thereon. It is. The two-cam material 2 is made of paper, metal, synthetic resin, inorganic material or the like, and paper is preferable in terms of weight. In this example, a paper hard cam material impregnated with magnesium silicate was used. The cell shape is not limited to a hexagon, but may be a triangle, square, pentagon, circle, waveform, or the like. Also, in this example, an aluminum fiber material is used as the air-permeable face material 8 Glass cloth fiber material, cloth fiber material, synthetic fiber material May be fiber material.

[0046] Container 9 has a size that can accommodate a hard cam material of up to 1000 mm in length and 1000 mm in width and 30 mm in height, and an emano-resion adhesive that can be used there 7 Viscosity of 45,000 to 85,000 MPa- s, non-volatile content 42-46 wt%, moisture 54-58 wt%. This is dipped in a 980 x 980 x 30 mm height Hercam material 2, and adhesive 7 is applied to a height of 1 to 2 mm at the tip of the hexagonal cell wall.

[0047] FIG. 7 (B) shows a state in which the cell wall of the hard cam material 2 is immersed in the adhesive 7 in the container 9, and FIG. 7 (C) shows a state in which the hard cam material 2 is pulled up from the container 9. Is shown. FIG. 7C shows a state in which the adhesive 7 adheres in a strip shape to a predetermined height at the tip of the cell wall, and the cross section rises in a drop shape (reference numeral 7).

FIG. 8 (A) shows a state where the tip of the cell of the hard cam material 2 to which the adhesive 7 is adhered is pressed against the air-permeable face material 8 made of aluminum fiber. The size of the face material 8 is vertical 1000 X horizontal 1000 X thickness 1.6 mm. In the figure, reference numeral 7 indicates an adhesive adhering so as to fill the concave corners formed by the cell wall tip and the face material 8.

FIG. 8B shows a state in which the bonded face material 8 is forcibly peeled off from the hard cam material 2 for the test after the adhesive is cured. The cell wall of the hard cam material 2 at a position outside the adhesion point is broken and remains in the hexagonal shape on the face material side (reference numeral 10). Sound absorption * Ventilation surface important for moisture absorption and desorption 11 is blocked with adhesive.

FIG. 9 shows a state in which the phenol foam material 1 is filled in the cell space. 2) Place the foam material on the two-cam material 2, press it with the press, and insert it until it reaches the adhesive adhesion position. In this state, since the foam material 1 comes into contact with the adhesive and absorbs the moisture, the adhesive hardens rapidly.

In FIG. 9, the dimensions of the foam material 1 are 1000 × 1000 × 28 mm in thickness. Compared to the dimensions of the above-mentioned hard cam material 2, the foam material 1 is larger by 20 mm both vertically and horizontally, and when the hard cam material 2 is press-fitted into the center of the foam material 1, It can be seen that a “border” (reference numeral 3) is formed around the periphery of the foam material having a width of 10 mm. This edging portion can prevent the foam material from falling off due to the cut of the cam-cam material at the end of the panel and the opening of the cell when adjusting the dimensions of the panel material. [0052] When foam material 1 has a thickness of 28 mm and her cam material 2 has a height of 30 mm, foam material 1 is fully pressed into double cam material 2 as shown in FIG. Thus, it can be seen that there is a margin of 2 mm close to the surface of the honeycomb material 2 on the pushing side, and a part of the upper surface force cell wall of the foam material 1 protrudes. In the figure, reference numeral 4 is given to this protrusion. This protrusion 4 is an adhesive applied to the face material when attaching another non-breathable surface material 8 'to the surface opposite to the surface on which the air-permeable surface material 8 is attached (see FIG. 10). The agent layer 7 is also supported by the lower force so that it does not adhere to the foam material 1, thereby preventing the open bubbles of the foam material 1 from being blocked.

[0053] As the non-breathable surface material 8 ', an aluminum material is also preferred because of the point of the back-up material effect in obtaining lightness, workability, and self-supporting strength. As the adhesive layer 7, a room temperature curing type epoxy adhesive (urethane or acrylic type is also acceptable) is selected, and the protrusion 4 The tip of is immersed and bonded. Thus, by applying a solid adhesive to the metal surface, an anticorrosive effect against moisture can be expected.

[0054] On the other hand, phenol foam has a strong water absorption as described above. As described above, the foam material 1 filled in the cell space and in contact with the portion where the adhesive 7 is present rapidly absorbs moisture contained in the adhesive and promotes its initial curing. This prevents the slip (slip) during the bonding of the face material 8 pressed against the two-cam material. Moisture absorbed and absorbed by the foam material 1 is gradually dissipated out of the panel with the help of the open cell structure of the foam material 1 and the air permeability of the surface material 8. At that time, the panel may be lightly heated to help dissipate moisture. Brief Description of Drawings

[0055] [FIG. 1] A diagram (A) of a her cam structure shown in a prior application, and a diagram (B) showing a state in which a filled foam material falls off a her cam material seluca.

FIG. 2 is a cross-sectional view (A) and a perspective view (B) showing a first embodiment of the present invention using a foam material having a size larger than that of a hard cam material.

FIG. 3 is a cross-sectional view (A) and a perspective view (B) showing a second embodiment of the present invention in which an air layer is provided in the middle of the hard cam material.

FIG. 4 is a cross-sectional view (A) and a perspective view (B) showing a third embodiment of the present invention in which a foam material layer is left in the middle of the foam material.

[Fig.5] Sandwich with the surface cam attached to the core-cam structure shown in Fig.2 as the core material It is a figure which shows the 4th Example of this invention made into the panel.

[Figure 6] Figure (A) showing a reinforcement seat partially placed around the panel (A), Figure (B) showing the connection between two panels, Figure B (), and protecting the entire area around the panel Protection put in

1 2

It is a figure (C) which shows a board.

[Fig. 7] A diagram showing a state where the adhesive is shallowly spread in a container and the hard cam material is immersed therein (A), the state where it is crushed (B), and the state where it is pulled up (C).

[Fig.8] A state in which a hard cam material with adhesive is pressed against the surface material (A), and a state of the surface material forcibly removed from the honeycomb material after the adhesive is cured (B) It is.

FIG. 9 is a view showing a state in which a foam material is filled in a cell space.

FIG. 10 is a view showing a sandwich panel completed by attaching another surface material to the upper surface of the honeycomb material in the previous figure.

Explanation of symbols

1, 1 ': Foam material

2, 2 ': No, two cam material

3: Border by foam material

3a: Air layer support

4, 4 ': Projection at the end of the honeycomb material

5: Air layer

5a: Reinforcement seat that can be partially placed around the panel

5b 1: Panel connecting plate mounting seat

5b2: Panel connecting plate

5c: Protective plate placed all around the panel

6: Foam material intermediate layer

7: Adhesive

8, 8 ': Surface material

9: Container

10: Cell wall broken at the position of adhesive

11: Ventilation surface of surface material

CZllC / 900Zdf / X3d £ 1 / 900Z OAV

Claims

The scope of the claims

[1] The cell space of the hard cam material (2) is filled with the phenol foam material (1) having the open cell structure, and the vertical and horizontal dimensions of the sheet-like phenol foam material before filling are determined. A hard cam structure, which is larger than the vertical and horizontal dimensions of the material, and is edged with a filled phenol foam material after filling.

[2] The hard cam structure according to claim 1, wherein one end or both ends of the honeycomb material (2) in the vertical direction protrude from the surface of the phenol foam material (1) by a predetermined length.

[3] Two sheets of phenol foam material (1, 1 ') are filled into the cell space of the hard cam material (2) with a vertical space, and there is no filler inside the honeycomb material. The honeycomb structure according to claim 1, further comprising an air layer (5).

[4] The two honeycomb materials are press-fitted from both the upper and lower surfaces of the foam foam material (1) having a thickness exceeding the total height of the two hard cam materials (2, 2 '). 2. The two-cam structure according to claim 1, further comprising a filler layer (6) in the intermediate portion in the thickness direction of the filler, wherein no hard cam material is present.

[5] A sandwich panel characterized in that at least one of the surface materials (8, 8 ') bonded to both surfaces of the honeycomb structure according to any one of claims 1 to 4 has air permeability.

[6] A liquid adhesive (7) having a predetermined viscosity is attached in a narrow band shape only at the tip of the cell wall facing one side of the hard cam material (2),

A breathable surface material (8) is pressed against the one surface of the honeycomb material to which the adhesive is adhered,

Before the adhesive is cured, a phenol foam material (1) having water absorption is pushed into the cell space from the other surface of the two-cam material until it comes into contact with the adhered adhesive. The sandwich panel according to claim 5, wherein the foam material in contact with the adhesive absorbs moisture contained in the adhesive to promote curing, and the adhesion of the surface material to the honeycomb material is quickly achieved. Production method.

[7] The step of adhering the adhesive in a narrow band-like manner only at the tip of the cell wall selects an emulsion adhesive as the adhesive (7) and holds the container horizontally (9 Pour the above-mentioned adhesive on the top of the cell wall and dip only the top of the cell wall of the hard cam material (2) into it. The manufacturing method of Claim 6 containing the process.